updated the usage of the std.builtin.Type enum

Author: pierrelgol

build.zig

@@ -24,6 +24,16 @@ pub fn build(b: *std.Build) void {
     const check_step = b.step("check", "check if the code compiles");
     check_step.dependOn(&check.step);
 
+    const lib_unit_tests = b.addTest(.{
+        .root_source_file = b.path("fluent.zig"),
+        .target = target,
+        .optimize = optimize,
+    });
+
+    const run_lib_unit_tests = b.addRunArtifact(lib_unit_tests);
+    const test_step = b.step("test", "Run unit tests");
+    test_step.dependOn(&run_lib_unit_tests.step);
+
     _ = b.addModule("Fluent", .{
         .root_source_file = b.path("fluent.zig"),
         .target = target,